Window icons
Use a IMAGE attribute to define the icon for a window.
If the window is opened with OPEN WINDOW
WITH FORM, by using a form file that defines an IMAGE attribute in the
LAYOUT section, the window will use this image as icon. Subsequent OPEN
FORM / DISPLAY FORM instructions may change the window icon if the new
form defines a different image in the LAYOUT section.
If you want to set a window icon dynamically, you can use the setImage() method of the ui.Window
built-in class.